Bedspring



. June. 1945- I c. J. ELDER Y 8,

BED "SPRING Filed June 19, 1943 INVENTOR. a/92155151055 4 6 ,1 arrow/5m.

rivets II.

Patented June 19, 1945 char-meander, Muncie, Ind., assignor to The. Moore Company,- Muncic, Ind., a corporation ofv 1 Indiana.

' .Anplication'June 19, 1943', Serial No. 491,437

v 7 Claims.

My invention relates to bed. springs,- and more,

particularlyto that type of bed spring which embodies a plurality of rows of compression springs. In certain types of suchbedsprings it is common to associate with the upper turns of .tl'ie'cornpression springs a series of strips of'sheet metal which extend across the spring v assembly transversely thereof .andwhich are .anchorecl 'tov the.

upper turns of' the compressionsprings. i

' It is the object of my invention to improve and cheapen the construction of. a bed; spring of th type just referred to.

In carrying out my invention Iassociate each row of compression springs a pair of sheet metalstrips which extend over the upperend turns of such compression springs". ,The' two.

sheet-metal strips associated with. each rowofthe springs are held in spaced. relationship relative to each other by sheet-metal cross-pieces While each of such metal stripsis cOnnectedQbY a seriesof tension springs with the adjacent sheet-metal strip I associated with the adjacent."

row ofcompression springs. Thetension springsjust referred to are provided at their ends with. hookswhich pass through holes in the sheetmetal strips and embrace the end turn of compression springs in order to anchor such end Acting between adjacent strips I5 associated vrespectivelywith adjacent transverse rows of compression spring II) are a series of helical tension springs 2I.' Each of these tension springs 'is provided at each end with a hook 22 con- .veniently formed by bending a portion of the end turn of the tension spring approximately at right angles as indicated at 23 in Fig. 2. The hooked ends 22 of the springs 2| extend through the openings I9 and embrace the end turn I8 of the associated compression spring II], to anchor such end turn to' the associated strip I5.

'In' addition totheholes I9 located at the points wheregeachstrip l5 intersects an end turn l3,

' the strips l5 may be provided between adjacent compression springsof a row with one or more additional holes l9, as will ;be clear from-Fig; I, andadditional coil springs 2| may have'their hooked ends engaged in such holes.

turns to the metal strips and. the tension springs to the metal strips. The accompanying, drawing'illustrates my invention: Fig. 1 is fragmental plan view of a spring assembly; Fig. 2. is a view similar to Fig. 1 but on an enlarged scale; and Fig, 3is a vertical section on the line 3--3 of Fig. 2.

The spring assembly shown in the drawing includes a plurality of transverse rows of coiled compression springs I0 supported in any desired manner from a base frame (not shown). The upper end turns of the springs I0 lie substantially in a common plane which also contains a border frame I| secured to the upper end turns of marginal springs I0 as by means of rivets I2.

Associated Witheach transverse row of springs II) are a pairof sheet-metal strips I5 held in spaced relation by sheet-metal cross members l6 secured to the two strips .I5 as by means of The spacing of each pair of sheetmetal strips I5 is desirably less than the diameter of xthe end turns so that they extend chordally across the upper end turn of each spring I 0 in the row with which they are associated. At the points where each strip I5 intersects the upper s end turns I8 of the compression springs III the strip is provided with openings I9, desirably in In the transverse row of compression springs I I] at each end of the assembly, the'upper end turns, I8 of the springs are connected directly to' the borderframe I I, as above indicated. Accordingly, only one of the strips I5 is used in association with each end row of compression springs |0, as will be clear from Fig. 1. If desired, this single strip I5 may be connected to the end of the. borderframe I by means of cross members I6- v 'Inaddition. to the tension springs 2| which extend longitudinally of .the spring-assembly between. adjacent transversestrips I5, I may employ similar tension springs 25 acting between the.upper turns of adjacent springs II] in each transverse row. These springs 25 serve to take up lost motion transversely of the spring assembly and to increase the resilience of the spring assembly. r

In assemblingthe bed spring, a sheetmetal strip I5 is laid over the end turns of a row of compression springs, and the hooks 22 of a series of tension springs 2| are then engaged with the strip I5 and the end turns I8 to anchor the strip to such end turns. In applying each of the ten sion springs 2|, it is held in a generally vertical position and its hook inserted through the slot I9. Thereafter, the spring 2| is rotated to a horizontal position and its hook 22 forced over the wire of the end turn I8. By bending the extreme end of the hook 22 out of the hook-plane, as indicated at 2B in Figs. 2 and 3, the operation of snapping the hook over the wire of the end turn I8 is facilitated. Desirably, the outer edge of each of the slots I9 is notched to make the slot of a general T-shape so that when the assembly is complete and the spring 2| under tension, the hooks 22 will be located in a definite position along the respectively associated slots 19.

If desired, the hooks 22 at the ends of each spring 2| may be so relatively, disposed in reference to the spring axis that in the assembly the springs 2| will be subjected to a slight torsional stress. This tends to take up lost motion, to hold the end turn [8 of each compression spring I tightly against the under surface of the strip l5, and to prevent noise.

I claim as my invention:

1. In a bed spring, a plurality of rows of coiled compression springs having their upper end turns located substantially in a common plane, a pair of spaced sheet-metal strips associated with each such row of compression springs, said pair of strips extending longitudinally of the associated row of compression springs and chordally of the upper end turns thereof, each of said strips being provided with longitudinal slots at points where it crosses the end turns of the compression springs, tension springs interconnecting adjacent strips of adjacent pairs, each of said tension springs being provided at each end with a hook which passes through one of said slots and also embraces the associated end turn of a compression spring, said slots having a length greater than the overall width of said hooks, whereby each hook can be bodily inserted through its associated slot.

2. In a bed spring, a plurality of rows f coiled compression springs having their upper end turns located substantially in a common plane, a pair of spaced sheet-metal strips associated with each such row of compression springs, said pair of strips extending longitudinally of the associated row of compression springs and chordally of the upper end turns thereof, each of said strips being provided with openings at points where it crosses the end turns of the compression springs, tension springs interconnecting adjacent strips of adjacent pairs, each of said tension springs being provided at each end with a hook which passes through one of said openings and also embraces the associated end turn of a compression spring, said openings having a width greater than the overall width of said hooks, whereby each hook can be bodily inserted through its associated opening.

3. The invention set forth in claim 1 with the addition that each of said slots is formed intermediate the length of its outer edge with a notch receiving the hook of the associated tension Cir spring. I

4. The invention set forth in claim 2 with the addition of cross members secured to and extending between the two strips of ea'ch pair, each of said cross members extending diametrically of an end turn of a compression spring.

5. In a bed spring, a plurality of rows of coiled compression springs having their upper end turns located substantially in a common plane, a pair of spaced sheet-metal strips associated with each such row of compression springs, said pair of strip extending longitudinally of the associated row of compression springs and overlying the end turns of said springs at opposite sides of such end turns, each of said strip being provided with longitudinal slots at points where it overlies the material of the end turns of the compression springs, tension springs interconnecting adjacent strips of adjacent pairs, each of said tension springs being provided at each end with a hook which passes through one of said slots and also embraces the associated end turn of a compression spring, said slots having a length greater than the overall width of said hooks, whereby each hook can be bodily inserted through its associated slot.

6. In a bed spring, a plurality of rows of coiled compression springs having their upper end turns located substantially in a common plane, a pair of spaced sheet-metal strips associated with each such row of compression springs, said pair of strips extending longitudinally of the associated row of compression springs and overlying the end turns of said springs at opposite sides of such end turns, each of said strips bein provided with openings at points where it overlies th material of the end turns of the compression springs, tension springs interconnecting adjacent strips of adjacent pairs, each of said tension springs being provided at eachend with a hook which passes through one of said openings and also embraces the associated end turn of a compression spring, said openings having a width greater than the overall width of said hooks, whereby each hook can be bodily inserted through its associated opening.

'7. The invention set forth in claim 5 with the addition that each of said slots is formed intermediate the length of its outer edge with a notch receiving the hook of the associated tension spring.

CHARLES J. ELDER. 

